I had a realization the other day that all the locks, regardless of what is locked, look exactly the same. Even if I'm picking the lock on a Falmer chest, its still uses a traditional iron lock, which doesn't really make sense. Anyone have any ideas on how to change this, or if there's already an existing mod for it?

This is driven by a special menu (SWF) just for lockpicking, and all game events for lockpicking evoke this menu. It could probably be modified by someone more knowledgeable of the interface, such as the SkyUI folks, but you'd still need, at minimum:

Art assets

Interface modifications necessary to drive this, if any

Hooks in SKSE (which the SKSE team would need to add) to allow you to bypass the standard lockpicking menu and evoke one of your own.